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Finding the Fourth Proportional to 68,729.80, 103,094.70 and 53,158.60

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Solution

The fourth proportional to 68,729.80, 103,094.70 and 53,158.60 is: 79,737.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,729.80 : 103,094.70 = 53,158.60 : x
  2. Step 2: Convert to fraction form
    68,729.80/103,094.70 = 53,158.60/x
  3. Step 3: Cross multiply
    68,729.80x = 103,094.70 × 53,158.60
  4. Step 4: Simplify right side
    68,729.80x = 5,480,369,919.42
  5. Step 5: Solve for x
    x = 5,480,369,919.42/68,729.80
  6. Step 6: Final answer
    x = 79,737.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.